President Trump may have won praise from both sides of the aisle when he revealed his intent to modernize America's aging infrastructure, but he also won the hearts of companies that would benefit from such an initiative -- companies like water utilities. Although his attention to the nation's infrastructure seems to have fallen by the wayside, though, it doesn't mean water utility stocks should be forsaken. 

Since demand for water isn't diminishing anytime soon, water utility stocks still have room for plenty of growth. So let's dive in and get to know two of the industry's leaders, Aqua America (NYSE:WTRG) and American States Water (NYSE:AWR) a little better, to see which one offers investors the best opportunity.

Dew drops on a blade of grass.

Image source: Getty Images.

Getting our feet wet

The third-largest water utility by market cap, Aqua America has been providing water services for more than 130 years. Currently, it serves more than 3 million customers across eight states. In business since 1929, American States Water is a regional operator that deals in more than just water. In addition to its 261,000 water utility customers spread throughout 10 counties in California, American States Water also distributes electricity to Southern California's recreational area, Big Bear.

To round out this introduction to the two companies, let's compare them on some common metrics.

Company Market Cap Dividend Yield FY 2016 Revenue FY 2016 Earnings Per Share FY 2016 Operating Margin Return on Equity (3-Year Average)
Aqua America $5.8 billion 2.33% $819.9 million $1.32 39.7% 13.10%
American States Water  $1.7 billion 2.00% $436.1 million $1.62 26.3% 12.32%

Data source: Morningstar.

A quick look at the companies' financials reveals that there's no runaway winner. American States Water may have swam in more profits last year, but Aqua America has been more successful over the past three years at converting shareholders' investments into profits. Having been briefly introduced to these two companies, let's jump in with both feet and get to know them better.

The case for Aqua America

Although investors familiar with water utilities don't expect dazzling growth on the companies' top lines, they do expect growth. In this regard, Aqua America is successful. Over the past five years, its revenue has risen at a compound annual growth rate (CAGR) of 1.77%. Because Aqua America maintains operations across eight states, it mitigates the risk associated with adverse regional weather phenomenon -- something with which American States Water is all too familiar. Due in large part to the drought that has ravaged California, American States Water over the past five years has had a revenue CAGR of negative 1.36%. Although weather experts contend the drought is now over, there's no guarantee that a similar event won't happen in the future.

In conjunction with growing revenue, Aqua America has seen an increase in its cash flow. Achieving an increase of more than 7% from the $368 million that it reported in fiscal 2012, Aqua America reported operational cash flow of $396 million in fiscal 2016. American States Water's cash from operations, on the other hand, has ebbed over the same time period, falling by more than 4%.

WTR Cash from Operations (Annual) Chart

WTR Cash from Operations (Annual). Data by YCharts.

For water utilities, growing operational cash flow is essential. It affords them the ability to grow through acquisitions and improve operational efficiency through asset renewal without having to rely too heavily on debt. Besides rate increases, Aqua America has increased its cash flow by growing its customer base through acquisitions. Thanks to a $53 million shopping spree over the past three years, Aqua America has completed 51 acquisitions; American States Water, conversely, completed none. Looking ahead, Aqua America has four pending acquisitions in fiscal 2017 estimated at more than $100 million, while American States Water has nothing on its horizon.

The case for American States Water

Growth in both revenue and cash flow growth are only two reasons among many to believe Aqua America is the more appealing opportunity; nonetheless, American States Water may attract investors with a more conservative bent. In spite of increasing its debt load more than Aqua America over the past few years, American States Water is currently less reliant on leverage and more liquid.

Company Debt to Equity Net Debt to EBITDA Current Ratio
Aqua America 0.96  4.24 0.44
American States Water 0.64  2.62 1.07

Data source: Morningstar and author's calculations.

Also, with the worst of the California drought apparently behind it, American States Water may be on the verge of reversing course from the declining revenue and cash flow it has recently endured.

Perusing the price tags

We've taken a closer look at these two companies, now let's compare their valuations.

WTR PS Ratio (TTM) Chart

WTR price-to-sales ratio (TTM). Data by YCharts.

At first glance, American States Water may seem like a bargain since it trades at a lower sales multiple than Aqua America. Relative to its five-year average P/S ratio of 2.7, however, American States Water's valuation seems less attractive. And taken in concert with the fact that it trades at a higher cash from operations per share multiple, American States Water's stock doesn't seem so enticing.

And the winner is...

Undoubtedly, the better choice for investors at the moment is Aqua America. Beyond the fact that Aqua America's customer base entails a larger geographic footprint, which doesn't subject the company to the same risks as a regional operator like American States Water, Aqua America has demonstrated consistent growth that shows no signs of stopping. To confirm that the company remains on the right track moving forward, investors can look for it to continue its steady revenue and cash flow growth while executing its growth-through-acquisition strategy. 

This article represents the opinion of the writer, who may disagree with the “official” recommendation position of a Motley Fool premium advisory service. We’re motley! Questioning an investing thesis -- even one of our own -- helps us all think critically about investing and make decisions that help us become smarter, happier, and richer.